Mast-trimming mechanism



W. H. PALMER AND G. E. DAVIES.

MAST IRIMMING MECHANISM.

APPLICATION FILED FEB. 26, I920.

1,880,735. Patented June 7, 1921.

INVENTORS 6.6 Davies AT TORNE) umro erase earur clerics,

WILLIAM HENRY PALMER AND GEORGE EDWARD DAVIES, OF MONTREAL, QUEBEC,

CANADA.

MAST-TRIMMING IVIECI'IANISM.

T 0 all whom it may concern Be it known that we, WILLIAM HENRY PALMERand Gnonon EDWARD DAVIES, subjects of the King of Great Britain, andresiding at 2192 Vvaverley street and 386 Ville Marie street,respectively, both of the city and District of Montreal, in the Provinceof Quebec, in the Dominion of Canada, have invented a new and usefulMast-Trimming Mechanism, of which the following is the specification.

The invention relates to a mast trimming mechanism, as described in thepresent specification and illustrated in the accompanying drawings thatform part of the same.

The invention consists essentially in the novel means employed forguiding the timber in cutting operations.

The objects of the invention are to facilitate the shaping of masts forships, flag poles, booms, derricks and various purposes; to avoid wasteincident to the cutting away of the corners from timber; to rigidly holdthe timber during cutting operations and coincidently guide it iin itsprogress for shaping purposes; and generally to provide a simple andefficient mechanism for holding and guiding the log or timber.

In the drawings, Figure 1 is a perspective view of a sawmill carriageand saw, showing the adjustable means employed for mounting the timberon the carriage.

Fig. 2 is an enlarged perspective detail of the guide and hold member.

Fig. 3 is a longitudinal sectional view of the adjustable holding pin.

Fig. 4: is a perspective detail of a finished mast.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, the carriage 1 is of any suitable typecustomarily used in feeding logs or timbers in a sawmill to be cut, andruns on the track 2.. r

The bases 3 of the holding and guiding members are mounted transverselyon the deck of the carriage 1, and these bases are preferably formed-with a deeper central portion 4, in which the sliding member 5 isdovetailed.

The holding pin 6 is screw-threaded into the slide 5 near to one end andpreferably leans inwardly slightly. This pin is formed with the hexagonbody 7, which tapersin the crown 8 to a comparatively sharp pointPatented June 7, 1521.

Application filed February 26, 1920. Serial No. 361,557.

9, and as this pin is preferably made of hardened metal, it will engagethe log or timber and securely hold it.

The pin 10 is formed with the hexagon body '11, from which extendsupwardly the neck 12, terminating in the tapered crown l3 andcomparatively sharp point 14. The pin extends downwardly from the body11 to the flange 15 and forms a threaded socket from the lower end.

The screw 17 fits into the socket 16 and also into an inclined screwhole 18 intermediate of the length of the slide 5, so that the said pin10 leans in the direction of the pin 6, consequently inmounting a log ortimber on the slide 5, these pins at their pointed ends stick into thetimber and securely hold it while the saw 19 takes off the strip fromthe log or timber in shaping it.

In the operation of this invention, the drawing shows a square timbermounted on the slides 5, the pins 6 sticking into one side of the timberand the pins; 10 into the other side. Both pins may be turned to get abetter grip of the timber,but the pins 10 permit of more adjustment inthis respect, but in screwing these pins 10 into the timber, naturallythe weight of the timber forces it tighter to the pins 6 and insures abetter grip there also.

The carriage is then operated up, to and beyond the saw, and the sawpasses through the timber longitudinally and takes off the projectingcorner. the slides 5 may be adjusted by means of the handles 20, orsimply by a hand bar or sledge, and moved so as to draw the timber toand from the saw, therefore a mast can be shaped as the carriageprogresses.

In shaping the timber it is of course turned around and sawed from endto end continuously until all the corners are off, and it is then almostfinished, only requiring treatment by a plane to complete a perfect mastor boom.

It will thus be seen that a very quick method is employed for shapingmasts, which does away with all the chipping and at the same time leavesvaluable pieces of lumber as a result of the operations, for the cornersand cuttings may be used for studdings, templets and various purposes,thereby saving considerable money as well as efficiently carrying outthe work in a short time, in fact as much as can be done in an Duringthis operation,

'herein shown adequately completes hour by this method, as it would takedays to do by old methods, and the mechanism the method of trimmingmasts by saws.

The pins and slides as described may be varied to some extent Withoutdeparting from the spirit of the invention, and so long as the changesare Within the scope of the claims for novelty following, the protectionaccorded shall not be invalidated.

W hat We claim is 1. In timber trimming mechanism, atransverse slidemounted on the carriage of a log cutter, the slide having spikedprojections set apart for the log or timber to settle on and be held ason the prongs of a fork dur-' ing sawing operations.

In timber trimmlng mechanism, ashiftable member a pin mounted on theshittable member toward one end and a pin mounted intermediately andWith the first named pin pointing upwardly 1n a direction adapted tofork the timber from the under side or sides during each operation. a

in timber trimming mechanism, a transverse slide mounted on thecarriageof a log cutter, the slide having spiked projections set apartfor the log or timber to settle on and be held as on the prongs of afork during sawing operations, one 01"- said spiked projections beingadjustable.

l. In timber trimming mechanism, atransverse slide mounted on thecarriage of a log cutter, the slide having spiked projections set apartfor the log or timber to settle on and be held as on the prongs of afork dursawing operations, said spiked projections leaning toward oneanother and adjustable in placing the log.

Signed at the city of Montreal, in the Province of Quebec, in theDominion of Canada, this 21st day oi February, 1920.

WILLIAM HENRY PALMER. GEORGE EDl/VARD DAVIES.

